Ok,you're missing MST (Mystical Space Typhoon) and a Gravekeeper's Descendant would do wonders at most situations.As for traps,l think solemn would be good to press on and stop your opponent from disrupting your big plays.Also,your synchro deck is a bit of a mess,you got only 1 level 3 tuner and 3 spellcaster-type monsters yet,you have 3 arcanite magician in your synchro deck,and 3 stardust is overkill.So my fixes are.
-1 Raiza
-1 Spy
-1 Threatening
+1 Descendant
+1 Mystical Space
+1 Solemn